Protein Information

Name hCE 1
Synonyms CAP1A; HCAP 1; HCAP1; HCE; HCE 1; HCE1; Human capping enzyme 1; RNA Guanylyl Transferase and 5 prime Phosphatase…

Compound Information

Name pyrethrins
CAS pyrethrins

Reference List

PubMed Abstract RScore(About this table)
18983829 Yang D, Pearce RE, Wang X, Gaedigk R, Wan YJ, Yan B: Human carboxylesterases HCE1 and HCE2: ontogenic expression, inter-individual variability and differential hydrolysis of oseltamivir, aspirin, deltamethrin and permethrin. Biochem Pharmacol. 2009 Jan 15;77(2):238-47. Epub 2008 Oct 15.

3(0,0,0,3) Details
16387282 Ross MK, Borazjani A, Edwards CC, Potter PM: Hydrolytic metabolism of pyrethroids by human and other mammalian carboxylesterases. Biochem Pharmacol. 2006 Feb 28;71(5):657-69. Epub 2006 Jan 4.


Pure human CEs (hCE-1 and hCE-2), a rabbit CE (rCE), and two rat CEs (Hydrolases A and B) were used to study the hydrolytic metabolism of the following pyrethroids: 1Rtrans-resmethrin (bioresmethrin), 1RStrans-permethrin, and 1RScis-permethrin. hCE-1 and hCE-2 hydrolyzed trans-permethrin 8- and 28-fold more efficiently than cis-permethrin (when k (cat)/K (m) values were compared), respectively.
3(0,0,0,3) Details
16855054 Godin SJ, Scollon EJ, Hughes MF, Potter PM, DeVito MJ, Ross MK: Species differences in the in vitro metabolism of deltamethrin and esfenvalerate: differential oxidative and hydrolytic metabolism by humans and rats. Drug Metab Dispos. 2006 Oct;34(10):1764-71. Epub 2006 Jul 19.


Results of CE metabolism revealed that human carboxylesterase 1 (hCE-1) was markedly more active toward deltamethrin than the class 1 rat CEs hydrolase A and B and the class 2 human CE (hCE-2); however, hydrolase A metabolized esfenvalerate 2-fold faster than hCE-1, whereas hydrolase B and hCE-1 hydrolyzed esfenvalerate at equal rates.
1(0,0,0,1) Details
19249324 Yang D, Wang X, Chen YT, Deng R, Yan B: Pyrethroid insecticides: isoform-dependent hydrolysis, induction of cytochrome P450 3A4 and evidence on the involvement of the pregnane X receptor. Toxicol Appl Pharmacol. 2009 May 15;237(1):49-58. Epub 2009 Feb 26.


Some pyrethroids such as bioresmethrin were preferably hydrolyzed by carboxylesterase HCE1, whereas others such as bifenthrin preferably by HCE2.
1(0,0,0,1) Details
16359636 Nishi K, Huang H, Kamita SG, Kim IH, Morisseau C, Hammock BD: Characterization of pyrethroid hydrolysis by the human liver carboxylesterases hCE-1 and hCE-2. Arch Biochem Biophys. 2006 Jan 1;445(1):115-23.

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